Yang Huiren
Yang Huiren is a Chinese 1-dan professional, now living in the United States (where he tends to be called Huiren Yang).
In 2010, he won the North American Ing Masters Tournament.
Co-author of Cosmic Go.
There is a biography at http://www.usgo.org/NAMT/players/hyang.html .
Yang played in the 10th LG Cup (2005), losing in the first round, to Chen Yaoye 4p (China). Chen went on to beat Lee Changho the next round! (Lee lost a very large group)
He plays as HYang, somerville and sususu at KGS.
http://www.youtube.com/watch?feature=player_embedded&v=zbidiBsXrZI